A couple weeks ago when I had close to ten carts and tabs open (in addition to
several other non-BrickLink tabs), I found the miniature store logos in the tabs
to be very helpful for quick navigation to pertinent shops. (And I consequently
made my own quick logo for shoppers.)
As of about a week ago however, all tabs, including stores, now have the BrickLink
standard logo.
I don't know if this lost distinction is the result of a BrickLink site change
or something else. I use Windows 7 and Firefox 58 by the way.